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aristotle - 3:14 pm on Aug 5, 2010 (gmt 0)
I thought of this too, but you are saying that if someone like a competitor scapes Google's own serp's via random keywords by some automated software, they now can take you down and damage your rankings and reputation by using spammy links pointed to your website.
If you will read my post, I didn't say anything about a competitor being able to use these links to bring down another site.
I think that Google is able to filter most of these links from the dataset that is fed into the algorithm, so that they have little if any effect on rankings.